LT8619EMSE#PBF

Overview

The LT8619EMSE#PBF is a synchronous monolithic buck regulator from Analog Devices, designed for high-efficiency power conversion in compact spaces. It operates with an input voltage range of 3 V to 60 V and delivers a continuous output current of 1.2 A. The device features a very low quiescent current of 6 µA, enabling extended battery life in portable applications. It supports adjustable switching frequencies between 300 kHz and 2.2 MHz, allowing optimization for size or efficiency. Packaged in a thermally enhanced 16-lead MSOP, it ensures reliable operation across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates high-side and low-side N-channel power switches for efficient synchronous rectification
• Features selectable switching frequency to optimize external component size and performance
• Includes internal soft-start circuitry to limit inrush current during startup
• Provides cycle-by-cycle current limiting and thermal shutdown protection

Applications

• Portable instrumentation and test equipment
• Industrial control systems and automation
• Battery-powered consumer electronics
• Distributed power supply architectures

Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape and reel or tube packaging as per manufacturer documentation. Confirm RoHS compliance status directly with Analog Devices official datasheets. Check for any recent Product Change Notifications (PCNs) that may affect pinout or material composition. Ensure the ordering part number matches the exact package type required for your PCB footprint.

Selection Notes

Select this component when a wide input voltage range up to 60 V is required in a small form factor. The 1.2 A output capability suits moderate load applications where space is constrained. Consider the adjustable frequency feature if electromagnetic interference (EMI) filtering needs to be tuned away from sensitive bands. Evaluate thermal performance requirements based on the MSOP package's heat dissipation capabilities under maximum load conditions.

Part Context

This part belongs to the LT8619 family of micropower synchronous buck regulators. It shares architectural similarities with other members like the LT8610 and LT8609 but offers distinct input voltage and current specifications. The EMSE package denotes a 16-lead MSOP with exposed pad for thermal management. It is positioned as a solution for applications requiring high efficiency and low standby power consumption.

Replacement Considerations

Direct substitutes within the same family include LT8619EMSE-5#PBF for fixed output variants. Cross-family replacements such as LT8610EMSE#PBF offer higher current capacity but different electrical characteristics. Verify pin compatibility and thermal requirements before substituting with competitors' parts. Always consult official Analog Devices documentation for qualified replacement lists.